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36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if !defined(nsWaveDecoder_h_)
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#define nsWaveDecoder_h_
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#include "nsBuiltinDecoder.h"
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/**
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* The decoder implementation is currently limited to Linear PCM encoded
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* audio data with one or two channels of 8- or 16-bit samples at sample
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* rates from 100 Hz to 96 kHz. The number of channels is limited by what
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* the audio backend (sydneyaudio via nsAudioStream) currently supports. The
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* supported sample rate is artificially limited to arbitrarily selected sane
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* values. Support for additional channels (and other new features) would
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* require extending nsWaveDecoder to support parsing the newer
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* WAVE_FORMAT_EXTENSIBLE chunk format.
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**/
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class nsWaveDecoder : public nsBuiltinDecoder
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{
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public:
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virtual nsMediaDecoder* Clone() {
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if (!nsHTMLMediaElement::IsWaveEnabled()) {
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return nullptr;
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}
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return new nsWaveDecoder();
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}
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virtual nsDecoderStateMachine* CreateStateMachine();
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};
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#endif
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